from cython_gsl cimport *

cdef extern from "gsl/gsl_sf_zeta.h":

  double  gsl_sf_zeta_int(int n) nogil

  int  gsl_sf_zeta_int_e(int n, gsl_sf_result * result) nogil

  double  gsl_sf_zeta(double s) nogil

  int  gsl_sf_zeta_e(double s, gsl_sf_result * result) nogil

  double  gsl_sf_hzeta(double s, double q) nogil

  int  gsl_sf_hzeta_e(double s, double q, gsl_sf_result * result) nogil

  double  gsl_sf_eta_int(int n) nogil

  int  gsl_sf_eta_int_e(int n, gsl_sf_result * result) nogil

  double  gsl_sf_eta(double s) nogil

  int  gsl_sf_eta_e(double s, gsl_sf_result * result) nogil

